ci: run on push for _dev branches

This is a compromise between running on all pushes vs only running for
main/PRs that still allows easy on-demand CI runs while developing.

Author: cpu

.github/workflows/CI.yml

@@ -4,6 +4,7 @@ on:
   push:
     branches:
     - main
+    - "*_dev"
   pull_request: {}
   schedule:
     - cron: "33 4 * * 5"